diff --git a/lua/keybindings.lua b/lua/keybindings.lua
deleted file mode 100644
index 8ba73a6..0000000
--- a/lua/keybindings.lua
+++ /dev/null
@@ -1,17 +0,0 @@
-vim.g.mapleader = " "
-
-# markdown 
-vim.keymap.set("n", "<leader>mks", "<cmd>MarkdownPreview<cr>", { silent = true })
-vim.keymap.set("n", "<leader>mkc", "<cmd>MarkdownPreviewStop<cr>", { silent = true })
-
-# tree
-vim.keymap.set("n", "<leader>ds", "<cmd>NvimTreeToggle<cr>", { silent = true })
-vim.keymap.set("n", "<leader>dc", "<cmd>NvimTreeClose<cr>", { silent = true })
-
-# buffer
-vim.keymap.set("n", "<leader>bp", "<cmd>BufferLineCyclePrev<cr>", { silent = true })
-vim.keymap.set("n", "<leader>bn", "<cmd>BufferLineCycleNext<cr>", { silent = true })
-vim.keymap.set("n", "<leader>bd", "<cmd>bd<cr>", { silent = true })
-
-
-
diff --git a/lua/plugins/help.lua b/lua/plugins/help.lua
index a56e03d..a746388 100644
--- a/lua/plugins/help.lua
+++ b/lua/plugins/help.lua
@@ -7,7 +7,30 @@ return {
  
             local wk = require("which-key")
             -- 快捷键在这里定义
-            wk.setup()
+	    wk.register({
+               ["<leader>"] = {
+	          b = {
+                    name="Buffer",
+	              p={"<cmd>BufferLineCyclePrev<cr>", "Go to pre buffer"},
+	              n={"<cmd>BufferLineCycleNext<cr>", "Go to next buffer"},
+	              d={"<cmd>bd<cr>", "delete current buffer"}
+	          },
+	         m = {
+                   name="Markdown",
+	              k={
+                        name="Markdown",
+		        s={"<cmd>MarkdownPreview<cr>", "MarkdownPreview"},
+		        c={"<cmd>MarkdownPreviewStop<cr>", "MarkdownPreviewStop"}
+	              }
+	         },
+                 d = {
+                   name="dirTree",
+                   s={"<cmd>NvimTreeToggle<cr>", "show dir tree on left"},
+                   c={"<cmd>NvimTreeClose<cr>", "hidden dir tree on left"}
+	        }
+           }
+        }, {silent = true, noremap = true})
+        wk.setup()
         end,
     },
 }